IOTA/IOTA-ES occultation update for (2216) Kerch / UCAC4 366-181095 event on 2024 Nov 21, 11:21 UT Visible from Summary ------- On 2024 Nov 21 UT, the 18.955 km diameter asteroid (2216) Kerch will occult a 11.4 mag star in the constellation Capricornus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.38 mag to 16.77 mag (the magnitude of the asteroid) for at most 0.670 seconds. This update is based on, astrometry for the asteroid kindly provided by the IAU Minor Planet Center. This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. The event at a glimpse ---------------------- * Rank: 99 * date and approx. time of event: 2024 Nov 21, 11:17 - 2024 Nov 21, 11:25 * geocentric midpoint of event [JD]: 2460635.97340867 * magnitude of target star: 11.40 * magnitude drop [mag]: 5.38 * estimated maximum duration [s]: 0.670 * Moon: 66 % sunlit, 175° distance * Sun: 70° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 19 * 1 sigma uncertainty interval [path widths]: +/- 0.16 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.001", 85°) * approx speed of asteroid's shadow [km/s]: 28.1452 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 366-181095 by 2216 Kerch on 2024 Nov 21 Centre Star Star Sun Path Limits Error Limits Alt E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 Crn o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Latitude Latitude Latitude Latitude - 10 0 0 - 7 49 29 11 17 55.8 1 107 69 - 7 54 52 - 7 44 7 - 7 56 31 - 7 42 27 .... - 9 0 0 - 8 7 30 11 17 55.9 2 107 70 - 8 12 52 - 8 2 8 - 8 14 31 - 8 0 28 0.06 - 8 0 0 - 8 25 20 11 17 56.1 3 107 71 - 8 30 42 - 8 19 58 - 8 32 22 - 8 18 19 0.04 - 7 0 0 - 8 43 0 11 17 56.3 4 106 72 - 8 48 22 - 8 37 39 - 8 50 2 - 8 35 59 0.03 - 6 0 0 - 9 0 30 11 17 56.7 5 106 73 - 9 5 52 - 8 55 9 - 9 7 31 - 8 53 29 0.03 - 5 0 0 - 9 17 49 11 17 57.0 6 106 74 - 9 23 10 - 9 12 28 - 9 24 50 - 9 10 49 0.02 - 4 0 0 - 9 34 57 11 17 57.5 7 106 75 - 9 40 18 - 9 29 36 - 9 41 57 - 9 27 57 0.02 - 3 0 0 - 9 51 53 11 17 58.0 8 106 76 - 9 57 14 - 9 46 33 - 9 58 53 - 9 44 53 0.02 - 2 0 0 -10 8 38 11 17 58.6 9 106 77 -10 13 58 -10 3 17 -10 15 37 -10 1 38 0.02 - 1 0 0 -10 25 10 11 17 59.3 10 105 78 -10 30 30 -10 19 50 -10 32 9 -10 18 11 0.02 0 0 0 -10 41 30 11 18 0.0 11 105 78 -10 46 50 -10 36 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22 11 23 41.1 58 255 -11 -10 39 42 -10 29 2 -10 41 21 -10 27 23 0.01 113 0 0 -10 17 45 11 23 44.6 57 255 -12 -10 23 5 -10 12 25 -10 24 45 -10 10 45 0.01 114 0 0 -10 0 55 11 23 48.0 56 255 -14 -10 6 16 - 9 55 35 -10 7 55 - 9 53 55 0.01 115 0 0 - 9 43 53 11 23 51.4 55 254 -15 - 9 49 15 - 9 38 32 - 9 50 54 - 9 36 53 0.01 116 0 0 - 9 26 39 11 23 54.8 54 254 -16 - 9 32 1 - 9 21 18 - 9 33 40 - 9 19 39 0.01 117 0 0 - 9 9 14 11 23 58.1 53 254 -17 - 9 14 35 - 9 3 52 - 9 16 15 - 9 2 13 0.01 118 0 0 - 8 51 36 11 24 1.4 52 254 -18 - 8 56 58 - 8 46 15 - 8 58 38 - 8 44 35 0.01 119 0 0 - 8 33 48 11 24 4.6 51 254 -19 - 8 39 10 - 8 28 26 - 8 40 50 - 8 26 46 0.01 120 0 0 - 8 15 49 11 24 7.8 50 254 -20 - 8 21 11 - 8 10 27 - 8 22 51 - 8 8 47 0.01 121 0 0 - 7 57 40 11 24 11.0 49 253 -21 - 8 3 2 - 7 52 17 - 8 4 42 - 7 50 37 0.01 122 0 0 - 7 39 20 11 24 14.1 48 253 -22 - 7 44 43 - 7 33 57 - 7 46 23 - 7 32 17 0.01 123 0 0 - 7 20 51 11 24 17.1 47 253 -23 - 7 26 14 - 7 15 28 - 7 27 54 - 7 13 48 0.01 124 0 0 - 7 2 13 11 24 20.2 46 253 -24 - 7 7 36 - 6 56 50 - 7 9 16 - 6 55 10 0.01 125 0 0 - 6 43 26 11 24 23.1 45 253 -25 - 6 48 49 - 6 38 2 - 6 50 29 - 6 36 22 0.01 126 0 0 - 6 24 30 11 24 26.0 44 253 -26 - 6 29 54 - 6 19 7 - 6 31 34 - 6 17 27 0.01 127 0 0 - 6 5 27 11 24 28.9 43 253 -27 - 6 10 51 - 6 0 3 - 6 12 31 - 5 58 23 0.01 128 0 0 - 5 46 16 11 24 31.7 42 253 -28 - 5 51 40 - 5 40 52 - 5 53 20 - 5 39 11 0.01 129 0 0 - 5 26 57 11 24 34.4 41 253 -29 - 5 32 21 - 5 21 33 - 5 34 2 - 5 19 53 0.01 130 0 0 - 5 7 32 11 24 37.1 40 252 -30 - 5 12 57 - 5 2 8 - 5 14 37 - 5 0 28 0.01 131 0 0 - 4 48 1 11 24 39.8 39 252 -31 - 4 53 25 - 4 42 36 - 4 55 6 - 4 40 56 0.01 132 0 0 - 4 28 23 11 24 42.3 37 252 -32 - 4 33 48 - 4 22 59 - 4 35 28 - 4 21 18 0.01 133 0 0 - 4 8 41 11 24 44.9 36 252 -33 - 4 14 5 - 4 3 16 - 4 15 46 - 4 1 35 0.01 134 0 0 - 3 48 53 11 24 47.3 35 252 -34 - 3 54 18 - 3 43 28 - 3 55 58 - 3 41 47 0.01 135 0 0 - 3 29 0 11 24 49.7 34 252 -35 - 3 34 25 - 3 23 35 - 3 36 6 - 3 21 55 0.01 136 0 0 - 3 9 4 11 24 52.0 33 252 -36 - 3 14 29 - 3 3 39 - 3 16 9 - 3 1 58 0.01 137 0 0 - 2 49 3 11 24 54.3 32 252 -37 - 2 54 29 - 2 43 38 - 2 56 9 - 2 41 58 0.01 138 0 0 - 2 29 0 11 24 56.5 31 252 -38 - 2 34 25 - 2 23 35 - 2 36 6 - 2 21 54 0.01 139 0 0 - 2 8 54 11 24 58.6 30 252 -40 - 2 14 19 - 2 3 29 - 2 16 0 - 2 1 48 0.01 140 0 0 - 1 48 45 11 25 0.7 29 252 -41 - 1 54 11 - 1 43 20 - 1 55 51 - 1 41 39 0.01 141 0 0 - 1 28 35 11 25 2.7 28 252 -42 - 1 34 0 - 1 23 10 - 1 35 41 - 1 21 29 0.01 142 0 0 - 1 8 23 11 25 4.6 27 252 -43 - 1 13 48 - 1 2 58 - 1 15 29 - 1 1 17 0.01 143 0 0 - 0 48 10 11 25 6.5 26 252 -44 - 0 53 36 - 0 42 45 - 0 55 17 - 0 41 4 0.01 144 0 0 - 0 27 57 11 25 8.3 25 252 -45 - 0 33 23 - 0 22 32 - 0 35 3 - 0 20 51 0.01 145 0 0 - 0 7 44 11 25 10.0 24 252 -46 - 0 13 10 - 0 2 19 - 0 14 50 - 0 0 38 0.01 146 0 0 0 12 28 11 25 11.7 23 252 -47 0 7 3 0 17 54 0 5 22 0 19 35 0.01 147 0 0 0 32 40 11 25 13.2 22 252 -48 0 27 15 0 38 6 0 25 34 0 39 46 0.01 148 0 0 0 52 51 11 25 14.7 20 252 -49 0 47 25 0 58 16 0 45 45 0 59 56 0.01 149 0 0 1 12 59 11 25 16.2 19 252 -50 1 7 34 1 18 24 1 5 53 1 20 5 0.01 150 0 0 1 33 5 11 25 17.5 18 252 -51 1 27 40 1 38 30 1 25 59 1 40 11 0.02 151 0 0 1 53 9 11 25 18.8 17 252 -52 1 47 43 1 58 34 1 46 3 2 0 14 0.02 152 0 0 2 13 9 11 25 20.0 16 252 -53 2 7 44 2 18 34 2 6 3 2 20 14 0.02 153 0 0 2 33 5 11 25 21.1 15 252 -54 2 27 40 2 38 30 2 26 0 2 40 11 0.02 154 0 0 2 52 58 11 25 22.2 14 252 -55 2 47 33 2 58 23 2 45 52 3 0 3 0.02 155 0 0 3 12 46 11 25 23.2 13 252 -56 3 7 21 3 18 10 3 5 41 3 19 51 0.02 156 0 0 3 32 29 11 25 24.1 12 252 -57 3 27 4 3 37 53 3 25 24 3 39 34 0.02 157 0 0 3 52 6 11 25 24.9 11 252 -58 3 46 42 3 57 31 3 45 1 3 59 11 0.02 158 0 0 4 11 38 11 25 25.7 10 252 -59 4 6 14 4 17 2 4 4 33 4 18 43 0.02 159 0 0 4 31 4 11 25 26.3 9 252 -60 4 25 39 4 36 28 4 23 59 4 38 8 0.02 160 0 0 4 50 23 11 25 26.9 8 252 -61 4 44 59 4 55 46 4 43 18 4 57 27 0.02 161 0 0 5 9 34 11 25 27.5 7 252 -62 5 4 11 5 14 58 5 2 30 5 16 38 0.03 162 0 0 5 28 39 11 25 27.9 6 253 -63 5 23 15 5 34 2 5 21 35 5 35 43 0.03 163 0 0 5 47 35 11 25 28.3 5 253 -64 5 42 12 5 52 59 5 40 32 5 54 39 0.03 164 0 0 6 6 24 11 25 28.6 4 253 -65 6 1 0 6 11 47 5 59 20 6 13 27 0.04 165 0 0 6 25 3 11 25 28.8 3 253 -66 6 19 40 6 30 26 6 18 0 6 32 6 0.05 166 0 0 6 43 34 11 25 28.9 2 253 -67 6 38 11 6 48 57 6 36 32 6 50 37 0.08 167 0 0 7 1 56 11 25 29.0 1 253 -68 6 56 33 7 7 18 6 54 53 7 8 58 0.23 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 366-181095 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 46 29.8687 DE: -16 50 55.638 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 46 29.8685 DE: -16 50 55.639 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.4 * B mag [mag]: 11.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2216) Kerch asteroid class: approx. diameter [km]: 19 approx. diameter ["]: 0.009 distance from Earth [AU]: 2.90640 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#60 date of fit: 2023 Apr 24 source of used astrometry: MPC, JPL number of used observations: 0 number of rejected observations: 0 time covered by the observations: 1800 Jan 01 - 1800 Jan 01 1 sigma uncertainty ellipse (major, minor, PA): 0.016", 0.001", 84.578° remarks: * orbital elements for (2216)Kerch : Mean anomaly = 351.8326678382 deg Arg. of pericenter = 183.6588021891 deg Long. of node = 155.5287182243 deg Inclination = 10.4356115335 deg Eccentricity = 0.0956750483 Semimajor axis = 3.0197480744 AU Perihelion dist = 2.7308335314 AU Mag: H = 11.27, G = 0.15 Epoch of elements : MJD 60635.47340825 TDT (2024 Nov 21.4734) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#602023Apr24,0.67,2024,11,21,11.361808,0.000852,-0.003717,15.743887,2.119608,0.005328,0.001506,0.000000,0.000000 80.5912,-16.7588,6.07,-20.07,False UCAC4 366-181095,20.77496357,-16.8487882,11.69,11.40,11.24,0.0,0,,20.79816209,-16.7588339,5.37,5.08,0,0,0 2216,Kerch,16.77,18.955,2.9064,0,0,3.317,6.42,,1.4,0 0,351.7438,2024,11,21,183.6588,155.5287,10.4356,0.09568,3.01975,2.73083,11.27,5.0,0.15 1.155,0.0163,0.0012,85,0.0014,Known errors,1.12,0,-1,-1 20241121_181095,60140.71 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:59 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org